* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Print Preview - C:\WINDOWS\TEMP\e3temp_5676\.aptcache
Survey
Document related concepts
G protein–coupled receptor wikipedia , lookup
Cell nucleus wikipedia , lookup
Membrane potential wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Cell culture wikipedia , lookup
Model lipid bilayer wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell encapsulation wikipedia , lookup
Lipid bilayer wikipedia , lookup
Cell growth wikipedia , lookup
Ethanol-induced non-lamellar phases in phospholipids wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cytokinesis wikipedia , lookup
Signal transduction wikipedia , lookup
Endomembrane system wikipedia , lookup
Transcript
Name: ____________________________ SECTION 3.3 CELL MEMBRANE Study Guide KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment. MAIN IDEA: VOCABULARY cell membrane phospholipid fluid mosaic model selective permeability receptor Cell membranes are composed of two phospholipid layers. 1. Draw a phospholipid in the box below. Label the three major parts. 2. Which part of a phospholipid is charged, or polar? 3. Which part of a phospholipid is nonpolar? 4. What type of molecules interact with water, polar or nonpolar? 5. Where does a cell membrane come into contact with water? 6. Why do the phospholipids surrounding the cell form a bilayer? A cell membrane has other types of molecules embedded in the phospholipid bilayer. List a function of each type of molecule in the table below. Molecule 7. Cholesterol 8. Proteins 9. Carbohydrates Function STUDY GUIDE, CONTINUED 10. In what way is a membrane fluid? 11. Draw a picture in the box below to represent selective permeability. outside MAIN IDEA: inside Chemical signals are transmitted across the cell membrane. 12. A detects a signal molecule and carries out an action in response. 13. A is a molecule that acts as a signal when it binds to a receptor. 14. A ligand that can cross the cell membrane can bind to an receptor. 15. A ligand that cannot cross the cell membrane can send a message to a cell by binding to a receptor, which then shape. Vocabulary Check 16. What is the fluid mosaic model? 17. The cell membrane allows some, but not all, molecules to cross. What term describes this property?